Core-molding machine



Nov. '30, 1926. 1,609,196

J. T. RAMSDEN CORE MOLDI NG MACHINE Filed March 8, 1926 -5 sheet -sheet1 Nov. 30, 1926. 1,609,196-

J. T. RAMSDEN CORE MOLDING MACHINE.

Filed March 8, 1926 3 Sheets-Sheet 2 MIME/V70 (70/712 7. l a m n Nov.30, 1926. 1,609,196

J.T.RAMSDEN CORE MODDING MACHINE Filed March 8, 1926 3 Sheets-Sheet 5 bypressure in the cylinder 9.

Patented Nov. 30, 1926. i it UNITED s'rarss Parana: QFFICE. I

JOHN T. RAMSDEN, OF IPIIILADELPHIA, PENNSYLVI'IIIIA, ASSIGNOR TO THETABOR IVIANUFACTUBING COMPANY, OF PHILADELPHIA, YENNSYL'VANIA, ACORPORA- lION OF PENNSYLVANIA.

CORE-MOLDING MACHINE.

Application filed March 8, 1928.

The principal object of the present invention is to facilitate themanufacture of cores for use in molding; another object of the inventionis to provide a simple, reliable and comparatively inexpensive machinefor closing two half core boxes or one half core box and a. drier plateand for presenting the parts at a convenient level for the workmen toperform such manual and other opera tions as are required of them.

Other objects of the invention will appear from the followingdescription at the end of which the invention may be claimed. However.it may be said that, generally stated,

the invention comprises a core molding machine including a pair ofrollover frames hingedly connected at their adjacent edges, means forlowering the hingedly connected edges of the frames to close them andfor raising the hingedly connected frames to open them into horizontalposition along with half mold boxes and a drier plate of which some areadapted for detachment and for pivotal connection with the fulcrum ofthe frames.

The invention also comprises the improvements to be presently describedand finally claimed.

In the following description reference will be made to the accompanyingdrawings forming part hereof and in which Figure 1 is a side view.partly in section of a machine embodying features of the invention.

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1, and I Fig. 3is a view similar to Fig. 1 showing another position of the parts.

In the drawings 1 and 2 are half core boxes hinged on the shaft 3 anddoweled to the frames 4 and 5 with pins 6. The hinged rollover frames 4and 5 are supported on the piston 7 by way of the shaft 3 and on pivotallinks 8. 9 is a power cylinder for the piston 7. The piston is shown inFig. 1 as held up 10 is the bed of frame of the machine shown as at sulstantially the floor level 11 which brings the top of the machine at aconvenient height for the workmen. 12 are sand boxes, and 13, 14 and 15are sand deflectors or guards. 16 is a latch adapted to swing over bothhalves of the core box and lock them together. It may be said that thedetails of Serial No. 93,010.

the frames 4 and 5 are suited to the particular core boxes employed.Core box 2 may be permanently hinged to the shaft 3 and core box 1 hasan open end bearing 17 to permit of its being lifted off and replaced bya drier plate. The drier plate is not shown because it is in effect aduplicate of core box 1 except that it provides a larger or otherwiseappropriate mold cavity.

The mode of operation may be described as follows: The parts being inthe position shown by full lines in 1, the half core boxes 1 and 2 arefilled with core sand and struck off. Exhaust-mg air from cylinder 9permits the piston 7 to fall carrying down the fulcrum shaft 3 togetherwith the hinged edge of the frames 1 and 2, which in turn revolve onshafts 18 while at the same time swinging it on the links 8 to a closedposition shown in Fig. 3. In this position the two half core boxes areclosed thus making a complete core. In this position the latch 16 isswung over and both halves of the core box locked together. Admittingair to the cylinder 9 lifts both halves of the core box up, the framesof course returning to the position shown in Fig. 1 and a slight pull orpush by the operator swings the core boxes over to the right of theshaft 3 in. Fig. 1, so that both half core boxes clamped together restupon the. frame 5. An air or other hoist, not shown because too wellunderstood, swings the top half of core box 1 about the shaft 3 clearingthe core which remains in the box 2. and the box 1 is then lifted clearof the trunnion shaft 3 and another hoist or like means swings intoposition a drier plate which. is lowered onto the shaft 3 and then swungdown on top of the box 2 where it is clamped with the latch 16. Piston 7is lowered swinging the core box 2 and the drier plate into the positionshown in Fig. 3 and admitting air to the cylinder, lifts the core I boxand drier plate up, and apush by the operator swings them into theposition shown at the left in 1 with the drier plate underneath and thecore box 2 on top. Core box 2 is then swung about shaft 3 to the rightinto the position shown in Fig. 1 ready to receive the next core. Thedrier plate with the core is removed as by a hoist or the like .and thecore box 1 is remounted on the shaft 3 and swung back into the positionshown at the left in Fig. 1 in full lines ready for making the nextcore.

It will be obvious to those skilled in the art to which the inventionrelates that modifications may be made in details of construction andarrangement and in matters of mere form without departing from thespirit of the invention which is not limited to such matters orotherwise than the prior art and the appended claims may require.

I claim:

1. A core making machine comprising a pair of rollover frames hingedlyconnected at their adjacent edges, and means for lowering the hingedlyconnected edges of the frames to close them and for raising the hingedlyconnected edges of the frames to open them into horizontal position.

2. A core making machine comprising a pair of rollover frames hingedlyconnected at their adjacent edges, half core boxes and a drier platehingedly connectable with the fulcrum of the frames and of which atleast two are detachable, and means for lowering the fulcrum of thehinged elements to close them and for raising the fulcrum of the hingedelements to open the frames into horizontal position and permit swingingmotion of the other hinged elements.

3. A core making machine comprising a pair of rollover frames hingedlyconnected at their adjacent edges, and pivotal links and a piston andcylinder upon which the frames are supported and by which they areclosed downwardly and opened upwardly into horizontal position.

4. A core making machine comprising a pair of rollover frames hingedlyconnected at their adjacent edges, a pair of half core boxes and a drierplate hingedly attachable to the fulcrum of the hinged frames and ofwhich at least two are detachable from that fulcrum, and pivotal linksand a piston and cylinder upon which said elements are supported and bywhich they are closed downwardly and opened and put into swingingposition upwardly.

5. A core making machine including a piston and cylinder, a fulcrumcarried by the movable element of the piston and cylinder, a pair ofrollover frames hinged to the fulcrum, pivotal links upon which theframes are supported, half core boxes hinged to the fulcrum and doweledto the frames and of which at least one is detachable, latch means forconnecting and disconnecting said boxes, and a drier plate providing alarger mold *avity and otherwise similar to the detachable core box andinterchangeable therewith.

JOHN T. RAMSDEN.

